Ron Garcia felt good about his first week as a management trainee at Mexicana Wire Winding, Inc. He had not yet developed any technical knowledge about the manufacturing process, but he had toured...

County Beverage Drive-Thru, Inc., operates a chain of beverage supply stores in Northern Illinois. Each store has a single service lane; cars enter at one end of the store and exit at the other end....

Lindsay is 25 years old and has a new job in Web development. Lindsay wants to make sure she is financially sound in 30 years, so she plans to invest the same amount into a retirement account at the...

Samples of emissions from three suppliers are classified for conformance to air-quality specifications. The results from 100 samples are summarized as follows: Conforms Yes No 1 22 8 Supplier 2 25 5...

Belk Department Store is having a special sale this weekend. Customers charging purchases of more than $50 to their Belk credit card will be given a special Belk Lottery card. The customer will...

A new product has the following profit projections and associated probabilities: Profit Probability $150,000 ....... 0.10 $100,000 ........ 0.25 $ 50,000 ....... 0.20 0 ....... 0.15 -$ 50,000 ..........

Consider the following four LP formulations. Using a graphical approach, determine (a) Which formulation has more than one optimal solution. (b) Which formulation is unbounded. (c) Which formulation...

The enrollments of the 13 public universities in the state of Ohio are listed below. College Enrollment University of Akron......... 26,666 Bowling Green State University.... 17,298 Central State...

Mary is considering opening a new grocery store in town. She is evaluating three sites: downtown, the mall, and out at the busy traffic circle. Mary calculated the value of successful stores at these...

The average annual cost of the first year of owning and caring for a large dog is $1843 (US News and World report, September 9, 2013). The Irish Red and White Setter Association of America has...

The I. Kruger Paint and Wallpaper Store is a large retail distributor of the Supertrex brand of vinyl wall-coverings. Kruger will enhance its citywide image in Miami if it can outsell other local...

Ecommerce.com, a large Internet retailer, is studying the lead time (elapsed time between when an order is placed and when it is filled) for a sample of recent orders. The lead times are reported in...

In 2012, Red Rose tea randomly began placing 1 of 12 English porcelain miniature figurines in a l00-bag box of the tea, selecting from 12 nautical figurines. (a) On the average, how many boxes of tea...

For its Music 360 survey, Nielsen Co. asked teenagers and adults how each group has listened to music in the past 12 months. Nearly two-thirds of U.S. teenagers under the age of 18 say they use...

A survey of athletic trainers asked what modalities (treatment methods such as ice, whirlpool, ultrasound, or exercise) they commonly use to treat injuries. Respondents were each asked to list three...

Electrocomp's management realizes that it forgot to include two critical constraints. In particular, management decides that there should be a minimum number of air conditioners produced in order to...

The Riverton Branch of the National Bank of Wyoming has 10 real estate loans over $1,000,000. Of these 10 loans, 3 are underwater. A loan is underwater if the amount of the loan is greater than the...

The Heinlein and Krampf Brokerage firm has just been instructed by one of its clients to invest $250,000 of her money obtained recently through the sale of land holdings in Ohio. The client has a...

The mileage (in 1,000s of miles) that car owners get with a certain kind of radial tire is a random variable having an exponential distribution with a mean of 50. In addition to providing the answer,...

In the law firm Tybo and Associates, there are six partners. Listed next is the number of cases each partner actually tried in court last month. Partner Number of Cases Ruud........ 3 Wu........ 6...

Southwestern University (SWU), located in the small town of Stephenville, Texas, is experiencing increased interest in its football program now that a big-name coach has been hired. The increase in...

South Side Oil and Gas, a new venture in Texas, has developed an oil pipeline network to transport oil from exploration fields to the refinery and other locations. There are 10 pipelines (branches)...

The Arden County, Maryland, superintendent of education is responsible for assigning students to the three high schools in his county. He recognizes the need to bus a certain number of students, for...

RMC, Inc., is a small firm that produces a variety of chemical products. In a particular production process, three raw materials are blended (mixed together) to produce two products: a fuel additive...

The distribution ages for students at the state college is positively skewed with a mean of = 21.5 and a standard deviation of = 3. a. What is the probability of selecting a random sample of n = 4...

A real estate investor has the opportunity to purchase land currently zoned residential. If the county board approves a request to rezone the property as commercial within the next year, the investor...

Use exponential smoothing with a smoothing constant of 0.3 to forecast the demand for fertilizer given in Problem 5-15. Assume that last period's forecast for year 1 is 5,000 bags to begin the...

Wellstone Inc. produces and markets replacement covers for cell phones in five different colors: bright white, metallic black, magnetic lime, tangerine orange, and fusion red. To estimate the demand...

Do you dislike waiting in line? Supermarket chain Kroger has used computer simulation and information technology to reduce the average waiting time for customers at 2300 stores. Using a new system...

Over a five-year period, the quarterly change in the price per share of common stock for a major oil company ranged from 28% to 112%. A financial analyst wants to learn what can be expected for price...

Jamal Crawford of the National Basketball Associations Portland Trail Blazers is the best free-throw shooter on the team, making 93% of his shots (ESPN website, April 5, 2012). Assume that late in a...

Jim Overstreet, inventory control manager for Itex, receives wheel bearings from Wheel-Rite, a small producer of metal parts. Unfortunately, Wheel-Rite can only produce 500 wheel bearings per day....

Cox Electric makes electronic components and has estimated the following for a new design of one of its products: Fixed cost = $10,000 Material cost per unit = $0.15 Labor cost per unit = $0.10...

Consider the data on wafer contamination and location in the sputtering tool shown in Table 2-2. Assume that one wafer is selected at random from this set. Let A denote the event that a wafer...

The steady-state distribution of temperature on a heated plate can be modeled by the Laplace equation, 0 = ? 2 T/?x 2 + ? 2 T/?y 2 If the plate is represented by a series of nodes (Figure), centered...

Toms, Inc., produces various Mexican food products and sells them to Western Foods, a chain of grocery stores located in Texas and New Mexico. Toms, Inc., makes two salsa products: Western Foods...

Wachesaw Manufacturing Inc. produced the following number of units in the last 16 days. The information is to be organized into a frequency distribution. a. How many classes would you recommend? b....

Suppose that a decision maker faced with four decision alternatives and four states of nature develops the following profit payoff table: a. If the decision maker knows nothing about the...

A new integrated computer system is to be installed worldwide for a major corporation. Bids on this project are being solicited, and the contract will be awarded to one of the bidders. As a part of...

A chain of sport shops catering to beginning skiers, headquartered in Aspen, Colorado, plans to conduct a study of how much a beginning skier spends on his or her initial purchase of equipment and...

An article in Concrete Research (Near Surface Characteristics of Concrete: Intrinsic Permeability, Vol. 41, 1989), presented data on compressive strength x and intrinsic permeability y of various...

Upon hearing that Ross White (see Problems 6-27 and 6-28) is considering producing the brackets in-house, the vendor has notified Ross that the purchase price would drop from $15 per bracket to $...

Vollmer Manufacturing makes three components for sale to refrigeration companies. The components are processed on two machines: a shaper and a grinder. The times (in minutes) required on each machine...

In Section 4.5, we used as an example testing the rationality of assessments of housing prices. There, we used a log-log model in price and assess [see equation (4.47)]. Here, we use a level-level...

The United States Coast Guard (USCG) provides a wide variety of information on boating accidents including the wind condition at the time of the accident. The following table shows the results...

Calculate the moments Mx and My and the center of mass of a lamina with the given density and shape. 32. p = 5 33. p= 1 semicircle -1 34. p= 2 quarter-cirele

A manufacturing company produces steel housings for electrical equipment. The main component part of the housing is a steel trough that is made out of a 14- gauge steel coil. It is produced using a...

For the Pittsburgh Development Corporation problem in Section 4.3, the decision alternative to build the large condominium complex was found to be optimal using the expected value approach. In...

A bank branch located in a commercial district of a city has the business objective of developing an improved process for serving customers during the noon- to- 1: 00 p. m. lunch period. The waiting...

The following costs have been estimated for the activities in a project: (a) Develop a cost schedule based on earliest start times. (b) Develop a cost schedule based on latest start times. (c)...

A Gallup Daily Tracking Survey found that the mean daily discretionary spending by Americans earning over $90,000 per year was $136 per day (USA today, July 30, 2012). The discretionary spending...

The owners of the Westfield Mall wished to study customer shopping habits. From earlier studies, the owners were under the impression that a typical shopper spends 0.75 hour at the mall, with a...

The Scott Corey accounting firm is installing a new computer system. Several things must be done to make sure the system works properly before all the accounts are put into the new system. The...

The compressive strength of concrete is normally distributed with = 2500 psi and = 50 psi. Find the probability that a random sample of n = 5 specimens will have a sample mean diameter that falls in...

Bay Oil produces two types of fuels (regular and super) by mixing three ingredients. The major distinguishing feature of the two products is the octane level required. Regular fuel must have a...

The Daytona 500 is a 500-mile automobile race held annually at the Daytona International Speedway in Daytona Beach, Florida. The following crosstabulation shows the automobile make by average speed...

The Moore & Harman Company is in the business of buying and selling grain. An important aspect of the companys business is arranging for the purchased grain to be shipped to customers. If the company...

Data on pull-off force (pounds) for connectors used in an automobile engine application are as follows: 79.3, 75.1, 78.2, 74.1, 73.9, 75.0, 77.6, 77.3, 73.8, 74.6, 75.5, 74.0, 74.7, 75.9, 72.9, 73.8,...

Find z0 such that P ( z0 < z < z0) = 0.76.

On the first statistics exam, the coefficient of determination between the hours studied and the grade earned was 80%. The standard error of estimate was 10. There were 20 students in the class....

The Lubricant is an expensive oil newsletter to which many oil giants subscribe, including Ken Brown (see Problem 3-17 for details). In the last issue, the letter described how the demand for oil...

The number of families who used the Minneapolis YWCA day care service was recorded during a 30-day period. The results are as follows: a. Construct a cumulative frequency distribution. b. Sketch a...

The Makonsel Company is a fully integrated company that both produces goods and sells them at its retail outlets. After production, the goods are stored in the companys two warehouses until needed by...

A bottle contains a label stating that it contains Spring Valley pills with 500 mg of vitamin C, and another bottle contains a label stating that it contains Bayer pills with 325 mg of aspirin. When...

The following table gives the average monthly exchange rate between the U.S. dollar and the euro for 2009. It shows that 1 euro was equivalent to 1.324 U.S. dollars in January 2009. Develop a trend...

The B. Hall Real Estate Investment Corporation has identified four small apartment buildings in which it would like to invest. Mrs. Hall has approached three savings and loan companies regarding...

Every home football game for the past eight years at Eastern State University has been sold out. The revenues from ticket sales are significant, but the sale of food, beverages, and souvenirs has...

Using the data in Problem 4-10 test to see if there is a statistically significant relationship between sales and TV appearances at the 0.05 level of significance. Use the formulas in this chapter...

For her final project, Stacy plans on surveying a random sample of 50 students on whether they plan to go to Florida for Spring Break. From past years, she guesses that about 10% of the class goes....

You are the operations manager for American Airlines and you are considering a higher fare level for passengers in aisle seats. You want to estimate the percentage of passengers who now prefer aisle...

Clark Property Management is responsible for the maintenance, rental, and day-to-day operation of a large apartment complex on the east side of New Orleans. George Clark is especially concerned about...

Coast-to-Coast Airlines is investigating the possibility of reducing the cost of fuel purchases by taking advantage of lower fuel costs in certain cities. Since fuel purchases represent a substantial...

Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales. To document this assertion,...

In a gambling game, Player A and Player B both have a $1 and a $5 bill. Each player selects one of the bills without the other player knowing the bill selected. Simultaneously they both reveal the...

CbSSports.com developed the Total Player Ratings system to rate players in the National basketball Association (NbA) based upon various offensive and defensive statistics. The following data show the...

Jim Wells, vice-president for manufacturing of the Northern Airplane Company, is exasperated. His walk through the companys most important plant this morning has left him in a foul mood. However, he...

The Teknomill Corporation must appoint a president, chief executive officer (CEO), chief operating officer (COO), and chief financial officer (CFO). It must also appoint a Planning Committee with...

For the following experiment, identify the experimental units, the treatments, the response, and the random assignment. A commercial food lab compared recipes for chocolate chip cookies. They baked...

Male Color Blindness When conducting research on color blindness in males, a researcher forms random groups with five males in each group. The random variable x is the number of males in the group...

Wyoming Electric Coop owns a steam-turbine power-generating plant. Because Wyoming is rich in coal deposits; the plant generates its steam from coal. 111is, however, may result in emission that does...

The mean cost to repair the smoke and fire damage that results from home fires of all causes is $11,389 (HomeAdvisor website, December 2014). How does the damage that results from home fires caused...

Harry's Hardware does a brisk business during the year. During Christmas, Harry's Hardware sells Christmas trees for a substantial profit. Unfortunately, any trees not sold at the end of the season...

An airline company is interested in the opinions of their frequent flyer customers about their proposed new routes. Specifically they want to know what proportion of them plan to use one of their new...

It appears that there is some truth to the old adage "That which doesn't kill us makes us stronger." Seery, Holman, and Silver (2010) found that individuals with some history of adversity report...

An industrial recycling center uses two scrap aluminum metals, A and B, to produce a special alloy. Scrap A contains 6% aluminum, 3% silicon, and 4% carbon. Scrap B has 3% aluminum, 6% silicon, and...

Office Automation, Inc., developed a proposal for introducing a new computerized office system that will improve word processing and interoffice communications for a particular company. Contained in...

Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and prepreview ads before the movie starts. Many complain that the time...

Match the parametric equations with the graphs labeled IVI. Give reasons for your choices. (Do not use a graphing device.) (a) x = t - 21, y=1-t (b) x = - 1, y = 2 - 1 (c) x= sin 31, y = sin 41 (d)...

Schank Marketing Research has just signed contracts to conduct studies for four clients. At present, three project managers are free for assignment to the tasks. Although all are capable of handling...

A pharmaceutical company is producing and marketing a ginkgo biloba supplement to enhance memory. In an experiment to test the product, subjects were assigned randomly to take ginkgo biloba...

Congress regulates corporate fuel economy and sets an annual gas mileage for cars. A company with a large fleet of cars hopes to meet the 2011 goal of 30.2 mpg or better for their fleet of cars. To...

The management of Brinkley Corporation is interested in using simulation to estimate the profit per unit for a new product. Probability distributions for the purchase cost, the labor cost, and the...

A variety of routine maintenance checks are made on commercial airplanes prior to each takeoff. A particular maintenance check of an airplanes landing gear requires an average of 15 minutes of a...

Myrtle Air Express decided to offer direct service from Cleveland to Myrtle Beach. Management must decide between a full-price service using the companys new fleet of jet aircraft and a discount...

Automobile Alliance, a large automobile manufacturing company, organizes the vehicles it manufactures into three families: a family of trucks, a family of small cars, and a family of midsized and...

A Bloomberg Businessweek North American subscriber study collected data from a sample of 2861 subscribers. Fifty-nine percent of the respondents indicated an annual income of $75,000 or more and 50%...

A television network has been receiving low ratings for its programs. Currently, management is considering two alternatives for the Monday night 8:00 P.M.9:00 P.M. time slot: a western with a...

A basketball player is fouled while attempting to make a basket and receives two free throws. The opposing coach believes there is a 55% chance that the player will miss both shots, a 25% chance that...

A college student has 7 days remaining before final examinations begin in her four courses, and she wants to allocate this study time as effectively as possible. She needs at least 1 day on each...

Suppose that a school band contains 10 students from the freshman class, 20 students from the sophomore class, 30 students from the junior class, and 40 students from the senior class. If 15 students...